Roller ore-crushing mill.



PATENTED NOV. I3. 1906.

W.,B.W1LD ROLLER ORE GRUSHING Mm..

APPLICATION FILED MAR. 21. I905.

3 SHEETS-SHEET 1.

110.835,694. PATBNTED Nov.,1`3,g1906.

W. E. WILD.

ROLLER ORE @RUSHING-MILL.

APPLICATION FILED MAR.21.1905.

' v a SHBBTSSH'E'BT 2.

No. 835,694. PATLNTLL NOV. 13, 1906-.

W. L. WLLD.

RULLLL ORL GRUSHLNG MILL.

APPLIGATION FILED MAR.21.1905.

s SHLETSAHBET a.

. provide Ineans for preventing the lateral disl the screen.` Fig. Gis a view showing-the ore-f screen m elevation, the outer''pI-oteclting'fjsI screen andFig. 8 is" a perspectivel View vattained by the mechanism illustrated in the Unrrnn STATES WILLIAM E. wird' oF DENVER, COLORADO ROLLER ORE-GRUSHING MILL.

Application filed March 2l, 1905. Serial No. 251,250.

Specification of Letters Patent. v

Patented Nov. 13,1906.' y

To (1f/ wiz/0m, it may concern:

Be it known that I, WILLIAM 'E WILD, a citizen of the United States of America, residing in `the city and county of Denver and State of Colorado, have invented a new and useful Roller Ore-Crushing Mill, of which the following isa' specification.

My invention relates to improvements vin roller ore-crI'Ishing mills.

The objects'of the invention are, first, to provide amill 'which is adapted for wet or dry crushing or grinding of ores and other materials by meansof vertically-disposed rollers which are rotated by a die-ring carried by a revoluble casing; second, to provide a cooperating revolvin screen which receives the ground vproduct om the rollers and -which returnsthe coarse material to the die-ring for regrinding; third, to provide an improved manner of feeding. ore or other material to the rollers and for conveying the ground product to the screen, and, fourth,to

placement of thel .rollers and for limiting their upward movement' .upon .the periphery of the die-ring, due to .rapid rotation ofthe-v casing. These and other minor objects are accompanying drawings, inwhichy FigureA 1 is a Vertical longitudinallsecltional view of the improved mill. Fig. 2 .is a vertical transverse sectional lView thereof` on the line 2 2 of Fig. 1, the screen'bein omitted. Fig. S-is'an end view ofthe fee' end of the mill.l Figjisfa plan view thereof,. the housingb'eingremovedp Fig. 5 is a'frontfelevation'of the gear-wheel which carriesna screen in section,.and thesupporting-frame," which lies between the two screens and is se cured at one end :to the screenecarrying gear@ die-ri-ng .and delivers it to K revolving section ofthe screen-supportingfram -Referring to theacc'ompanyin `dr.a g1g the numeral 1 indicates suitable, ou'ndation-l standards 2,hjaving 'shaft-boxesfjfat their? upper endsffwhch support the -V drivjiiaggshaft 4 of the Inill.' These standards-form tegral part orfendplates and; upp` portions of which are` semicircularr" for;

shown. A sheet-met'al housing '7: extermisVIT depth, one side of which is openj'in which is'fitted adie-ring 13.

from one end plate to" the other and the plates and housing completely inclose the mill.'= The upper or semicircular portion of the'ho'using is hingedzon one side tothe lower half, as shownA at 7%, .and on the same horizontal. plane as theA axis of the shaft, while' at the opposite side it is securedto the lower half by any suitable'form of catch, so that it-Inay be'swung back to afford accesstothe mill Vwhen desired.Y The shaft is heldl-inits boxes bycaps 3A and 3B, which are .provided with the usual oilfreceivers. The'ends'of the shaft extend beyond Ithe boxes ,3, and upon one end is keyed a pulley 8, while vthe .other end carriesa ulley 9, which is preferably secured upon t e shaft by set-screws.

- Upon the shaft Ll-adjacent to the end plate 5 ismounted a Acircular ring 1f()` of` suitable The rin has .a hubv 10A.1 through which .the Ashaft passes, and the .hub and shaft are -rigidly locked together by the employment of the`v l usual feather and gib, as shown.v `This rin 'comprises' va disk 11, having an integra flanged shell 12jat' right angles thereto with- The inner periphery of the shell tapers slightly, as shown l and the'die-ring is'A of slightly less diameter than the shell, andafter the die-ring is placed the .shell wooden wedges 14 are.

-holds it within the ring. The inner diameter .lof this ring Where'it. abuts against the die-- ring/isi sub stantially the same as the inner ffdianleter of thesaid die-ring, and from this` point outward a `short distance the diameter convergesfor grows smallerto .form an in-` v surface 17, which terminates in anannular lip 18,1 which surrounds a circularl screen 119 v to befhereinafter described. The

l i reducedin';thickness adjacent to its 1 circlgln 'eience, wherev it is bolted to the shell 12,*and'this reduced portion forms an annular shoulder 20,' which is provided with a oflwat'er-'inlets 21, which extend in zwardthiough the inclined surface 17.v These holesare preferably arranged at a tangentto the? oflthe rin and v convey water to the the. mil from a supply-pipe 22, valve .23,1 by which the V Supplygor drivenin between the. shelland ring, and

these rigidly. secure the `ring to the shellof the casing'. '1 Theiiange .1 5 'ofthe shell'12 is l:provided witha" plurality of bolt-holes, and tofthisflange, is'bolted a rin l1.6,.which also IOO charged under pressure against the shoulder 20, and as the ring revolves in the direction of the arrow the openings 21 will catch the water, which will be forced by the rapid rotatlilon of the wheel into the interior of the Within the die-ring l place one or more rollers 24, between which andthe die-ring the ore or other material is pulverized as the xo ring revolves, and as the hard lumps of ore cause the rollers to jump and the rotation of the ring causes the rollers to be carried upon 'the tread of the die-ring in the direction of lits rotation it is essential to provide means x5 for limiting the upward movement of the rollers and for preventing them from being thrown laterally from the ring, and I accom.-l

plish this in the following manner: A hub ,is slipped upon the driving-shaft .until one zo end abuts against the hub of the ring 10. The.

other end of the hub 25 is formed with a flange 26, which is bolted to the end plate 6 by bolts 27, which also pass through plates 28 which serve to stiifen the end plate 6 at 25 the point 'where the hub is bolted thereto. The drivingshaft 4 is adapted vto rotate freely in the hub 25, and the bore -of said hub is formed withan annular oil-space 29. The caps 3A and l3B of the shaft-boxes are pro- 30 vided with the usual oil-receivers, as'previous'ly mentioned, and from the receiver of the cap 3B extends a passage 30, which enters the said voil-space 29 and conveys oil.

from the cap to the portion of the shaft with- 3 5 in the hub. A casting 31, comprising arollerguard 31A, a stop-arm 32, a scraper-supporting arm 33, and a hub 34, is supported upon the hub 25 and secured thereto by setscrews 35. The hub 34 also overlaps the 4o hub 10A of therin and is arranged to prevent grit 'from wor ingthrough to the shaft.

The guard 31 will prevent the rollers from being thrown from the ring, and the stopj arm 32 will prevent the excessive upward 4 5 movement of the rollers, due to the rotation of the ring.

Mounted upon the hub 25 adjacent to its flange 26 is a arge gear-wheel 36, having an annular lgroove 37 `on that side facing the 5o ring 10. l Therim of this wheel is connected to its 'hubby spokes, so as to provide a plurality of open spaces through which the ore from the hopper may pass, las will presently be shown. The opposite side of the wheel is formed with a circular projection 37A, having an annular lip 38, which surrounds a circ'u' ar bandit-39, formed on theend plate 6,

and from the lip the opening through the wheel inclines outwardly, similar to the open- 6o ing in the ring 16.

' Within the groove 37 of the gear-wheel 36 secure the circular screen 19, and this screen comprises an outer band-screen of fine mesh and an inner band-screen of 6 5 coarser mesh, the coarser screen being used senese to protect the fine screen, between which are interposed a pair'of rings or bands 4'() and 40A which are located respectively at the front and rear ends of the screen and which arev connected by aseries of1 arms 40B. These arms,y are preferably set at an angle, as shown in Fi 6, and the screen has a slight outward incfine or is in the form of a frustum of a cone. These screen-bands are preferably formed in sections, which are bolted together, as shown. The smaller end of thescreen is placed in the groove 37 and is held therein by set-screws 41, which pass through the projections 37A and engage the band40, and the outer end of the screen passes through the ring 16 a slight distance,

and upon this end of the screen is placed a` flexible band 42, preferably rubber, which lies adjacent to the inner face of the lip 18 of the ring.

Upon the under side of each arm 40B isformed a longitudinal rib 40C, the section -of screen fabric extending between .the arms from rib to rib, and upon the ribs are bolted angle-bars 40D, which catch the pulverized ore as the screen revolves and deposit it upon the screen again. A scraper 33A is supported upon a bolt 33B at the upper end of the arm 33 of the casting 31. This scraper comprises an enlarged end which is recessed or hollowed out to form a chute 33, the upper end of which terminates in a lknife-edge which contacts with and extends across the face of the die-ring 13, and a curved tail 33D, which serves to balance the chute. Theflrnifeedge is at an angle to the axis of the ring, as shown in Fig. 7, and the chute has a downward and lateral direction. A spring 33E connects the end of the tail with the arm 33 and normally holds the knife-edge of the chute in contact TOO with the die-ring. The end plate 6 is pro# vided with a feed-opening 43, which is provided with a chute 44, upon which rests the discharge end of a vibrating feeder 45, the opposite end of which is supported by a ver tical arm 46, the upper end of which is pive oted to a web 47, formed upon the under side of the feeder, while its lower end is pivoted to a projection 48 on the end plate 6. A camtappet 49 is Asecured to the arm adjacent to its upper end, and a spring 56 bears against the opposite side of the arm from the tappet, the lower end of said spring being secured to a lug 51 on the bottom flange of the end plate by a screw 52. A hopper 53 is secured to the end plate above the feeder 45, and the 'discharge end of this hopper extends into the feeder, as shown in Fig. 3. A shaft 54'extends across the side of the housing and is journaled in boxes 55 upon the end plates 5 and 6. This shaft carries a gear-wheel 56, which meshes with the screen-carrying gearwheel 36, and a belt-wheel 5 7, which connects by a belt 58 with the pulley 9 on the end of the driving-shaft 4. The shaft 54 also carries a cam 59, which engages the tappet 49 on the arm 46, by which the arm is moved forward, andiwhen the cam escapes the tap- '.pet the arm is thrown back by the Spring l50,.

would lie entirely within the mill-housing 7. Inpthis event the feeder-supporting arm 46 would be centrally pivoted and the cam 59 would contact with its lower end. The end plate 6 is provided with an opening 62, which is closed by a sliding door 63, the said door affording means for inspectingA the mill during its operation. In assembling the mill .the

upper half of the housing is thrown back on its -hinge and the hub 25 is secured to the end plate in axial line with the shaft-boxes 3.

' The gearWhee l- 36, carrying the screen 19, is

then slipped` upon` the hub, and the casting 31 is secured upon the outer end of said hub.

The ring lO'is then held in axial line With-the y .hub,.and the shaft 4 is passed through one of the boxes, thenthrou'gh the hub and ring and throughthe outer box, after which the' ringis secured upon the shaft in the manner before described and the band-wheel'S and', pulley'9 are secured'lupon their. respective ends of the shaft.-

The operation ofthe improved mill is as follows; Thering-510 is-revolved at a suffi# ciently high ratei-of speed inthe direction of thearrow, and `the rollers upon the die-ring willbefrevolvedin the same direction and Wi'lliat the same time b'e carried upward upon the ring-by 'its momentum. .i Ore which has y Ward into the'chute.

gear-Wheel 56.turns the screen-carrying gear been vpreviously reduced Av,toe small lumps by a crusher'is. then'fed to tlie'ho'p'per. 53 and the ore at this stage may be dry` or it may be mixedwith Water. .Theore falls into the feederflVv andf is deliveredto the hopper# chute 411 in the following mannen: The pulley" 9 through-:belt 58 turns the beltwheel 57 on shaft 54,\and the ca1n59" is thereby revolved, giving `the feeder an .intermittent shaking motion, Which throws the ore for- At the same time the 36 man opposite direction to thatof the ring 10. The ore feeds through the opening 43 in the end plate 6, through the spokes of the gear-Wheel, and onto the screen, and anyleakage of- Water will be prevented by the band 39 of the end plate andthe lip 38 of the Wheel. As the o re falls on'and feeds across the screen particles that are fine enough pass through l the coarse and fine screens, while such particles *as pass the coarse screen, but are too i coarse to pass the fine screen, Work back .through the coarse screen and with the major `the screen.

of the screen will prevent the escape of anyv portion are fed to the die-ring, where they are carried around in the direction of the rotation of the ring, and pass beneath the rollers, where they are reduced to a greater degree ofneness, and being damp they adhere to the ring and are carried around until they strike the scraper 33A, when `they are deflected onto the screen again. The particles which I are ne enough to pass through' thev fine screen are discharged, but the coarser particles are returned to the die-ring and are again acted upon by the rollers, and the ore continues its movement from die-ring to. screen until it is fine enough to pass through.- Water all Athe while is Vbeing forced into the die-ring through theI openingsA or inlets 21 of the ring 16, and the ore will be of such a Watery consistency as to readily pass through The rubber band upon the end portion of the mixed ore and water except y through the screen and will also prevent the portion which passes through the screen from umps of ore Will ,cause the kroller to` jump from the die-ringand strike violently against Vpassing back toA the vmill again. The larger l I 9. l

each other; but they will be held against. lat- `eral' displacement by the .guard 31A,l and when the ring is run at a high rate of s eed the .rollers` will be prevented from clim ing too high upon the die-ring by the stop-arm 32.

Fiom the foregoing it will be Seen. that'my improved `mill combines lightness and simplicity of constructionfand that it possesses' all .the advantages of .any of the types ofl millsv in general use and can be .much more cheaply manufactured Y The improved style of screen andthe manner of constantly bringing the ore in contact with the screen after it has been acted upon by the rollers prevents the ore from being,-

pulverized to such a degree of fineness vas to produce slimes ,-as the instant the ore is lsuflicientlyfine: to pass through the fine screen it is discharged therefrom forthwith and hasA action of therollers.v

not the chance of again being-delivered tothe 'l The ore may be fed -dry the water which passes in .throu h the inlets 21 of the ring 16 ,will mix with .t it is being pulverized;

vv-hen desired, l'arid I Y Having describedthe invention, what I claim as new, and desire to secure by Letters Patent, isj; i

`1. In a'mill of the character described, a vertical, rotatable ring, open on one side; a die-ring in saidA ring; rollers movable on said die-ring; a ring secured upon the open side'of said ring against said die-ring, having an annular projection provided with tangential inlets Which extend to the inner periphery of the ring; a rotatable band-screen, one end of which projects through said ring, and means for rotating said ring and screen in opposite directions. I

2. ln a mill of the character described, the

cular ring mounted thereon, which is open on one side 5 a die-ring in said ring; rollers movable on said die-ring, a ring lbolted to said ring and against said die-ring, having tangential inlets Whiohextend from the o'uter to v the inner periphery of said ring g a gear-Wheel having an annular groove in one of its faces; a band-screen, one end of Which fits into said annular' groove, while its other end projects into said ring, a stop for limiting the upward movement of said rollers upon the die-ring; a guard for preventing their lateral displacement, and means for rotating said ring and screen in different directions.

3. In a mill of the character described, the combination with standards having a horizontal shaft mounted thereon, ofv a circular ring rigidly mounted thereon, which is open on one side; a die-ring in said ring g rollers which rest u on said die-ring, and which are movable Wit respect to a horizontal plane; a ring secured to said ring and against the diering, having tangential inlets which communicate with the interior of the ring a hub upon said shaft Which is immovable with `respect to the shaft; a gear-wheel mounted on said hub, having a circumferential groove in its face adjoining the ring a band-screen, one' end of which is secured in said groove, While the other extends through the ring upon the ring; means for limiting the lateral and upward movements of the rollers, and means for rotating the screen and ring in `opposite directions.

4. ln a mill of the character-described, the combination with a pair rof vertically-disposed end plates, and a housing connecting said end plates, of standards upon said plates' having shaft-boxes thereon; a shaft extending through said plates and resting on .said boxes a hub secured to one of said end plates, through which said shaft passes; a gear-Wheel revolubly mounted on said hub, having an annular groove in one face; a band-screen, one end of which is secured in said groove; a circular ring keyed to said shaft, which is open on one side; a die-ring in said ring; a ring secured to said ring having a conical bore terminating in an annular lip, which surrounds the other end of said screen, and tangential inlets which communicate with said conical bore; movable rollers which rest upon said die-ring; a casting secured upon said hub comprising an upright arm, a rollerstop, and a roller-gear; a scraper on said upright arm, which contacts With the die-ring, having a chute which deflects the pulverized material into the said screen, and means for rotating said screen and ring in opposite direct-ions.

5. ln a mill of the character described, thecombination with a vertical, rotatable, ring open on one side and having a die-ring; moveeaeai able rollers on said Adie-ring; a ring bolted to said ring, having inlets through its periphery at a tangent to its axis, a stop to limit the upward movement of said rollers upon the diering, and a guard to prevent their lateral displacement of a rotatable band-screen, one end of which extends through the ring upon the ring, means for feeding ore through the other end of said screen, means for rotating said screen and ring in opposite directions, and a scraper Which contactswith the said die-ring, and deflects the ore carried thereby onto the said screen.

6. ln a mill of the character described, the combination with standards havin boxes thereon of a hub secured to one of sairgl ards; a power-driven shaft extending through said hub and restin in said boxes; a gear-wheel mounted on sai 'hub a circular band-screen secured at one end to said Wheel 'a circulary ring keyed to said shaft, open on one side and having a die-ring; movable rollers on saiddie-ring a ring on the open side of said ring, through which the other end of the screenprojects; a hub secured upon the end of the first-mentioned hub, havinOr a rollerguard, a roller-stop, and an upright arm; a scraper pivoted on said arm, which contacts Wheel in mesh with said screen-carrying gear; pulleys on one end of each of said shafts; a 'belt connecting said pulleys, Aand a vibrating feeder for delivering ore to said screen.

7. In a mill cf the character described, .the combination with a vertical,l rotatable cir- -cular ring, open on vone side radie-'ring in said ring and rollers loosely mounted on said dierin of a circular rotatable band-screen, one en of which projects into said ring; a chute communicating with the oppositefend of said screen 5 a vibratin feeder Whichdischarges1 into said chute; a opper above said feeder 5 and means for rotating said ring and screen in opposite directions.

8. In a mill ofthe character described, a pair of upright end plates having integralV shaft-boxes; a power-driven shaft in said boxes, ,having a pulley on one yend; a shaft parallel to said power-driven shaft, journaled upon said end plates, and having a belt- Wheel, a cam necting said pulley and belt-Wheel; a hub stand- `with said die-ring; a shaft having a gear. l

IOO

IIO

and a gear-Wheel; a belt consecured to one of said end plates, through which said power-driven shaft passes, a gearwheel on said hub in mesh with the first-mentioned gear-Wheel a circulan, conical bandscreen, secured to said gear-Wheel; a hopper on said end plate; a feeder below said hopper; an arm pivoted to said feeder and to saidend plate, having a tappet which is engaged by said cam; a spring for` moving said' arm against the action of the cam; a chute leading from said feeder to said screen, in combination With a circular rotatable ring, secured to said porter-driven shaft, which 1s open on 50 the interior of the screen., and means-for roone'side to receivevtlie opposite end of said screen a die-,ring in said ring, loose rollers on v said die-ring; means" for limiting Athe lateral and upward movement of said-rollers, and a I said die-ring; a conica scrapel` which ccntactsawith theperiphery of said ring and conveys the pulveri'zed productl i thereon, to the interior of thescreen.

19,1In a millof v thelcharacter described, a

vertical, rotatable, circular ring open on one side, -having a die-ring and loose rollers on A screen, comprising-an inner and vouter screen. of diiierent'mesh; a

band at eachend between saidcoarse and tinev screen, aiidarms connecting said.. bands; a

gear-wheel to which the smaller end oi" said.

@screen is secured, While its larger-fend pro-` jects into said ring, a shaft Jfor. supporting said ring, means for supporting said screen independent of said shaft, andmeans for ro'- tating said gear-wheel in anopposite directionl to'said'ring.

vl0. In a mill offthe characterdescribed, a y vertical, rotatable, circular'ring, open on one side; a die-ring in said ring, and loose rollers on said die-ring; a ring bolted to the lopen side of said ring, the inner periphery of Whichis conical, and terminates in an annu.- lar lip, sa-id ring having tangential inlets communicating with the interior oi" thering; a conical screen,` one end of which projects through said annular lip; a iiexible band on the end of said screen, adjacent to the inner .side Iof said lip a scraper whichcontacts l1'. -In a niill'oithecharacter speciiied, the

- Wheel havinganjannular groove-in its'rim; a

conical screen, comprisinga'pair o fscreens of diiferentmes'h; bands interposed at each end j. between the twov screens, and connected by: y arms, the larger end ofsaid screen projecting into said ring, while its smaller end lies in; the groove. of said wheel; a scraper which i conveys the pulverized material fromthe ring to tating the screen and ring infopposite directions. l 'a l2. Ina mill of the vcharacterv described,:a

rigidly-supported sleeve; vashat passing loosely through said sleeve a lcircular rotatable ring carried by said shaft, having a diering, and loose rollers on 'saiddiej-ring, one

side of said ring .being open; a ring upon the open side of said -ring, having peripheral inlets vat a tangent toits axis, which communicatewith the interior of said ring; a hub secured upon the end of said rigid Iiub, having an integral guard which preventslateral .dis-

placement of said rollers, a stopA which limits with said die-ring a conical screen, one end of which projects through the ring having the tangential inlets; a wheel having an annular groove in its rim', in which the `other end of said screen is secured, and means for rotating Wheel infan opposite direction to said 1 7s s aid' -f 13.. .In a mill of -thecharacter described, the

v 65 their upward movementupon the die-ring, "and an upright arm; a'scrapersecured' to `'said arm and means for holding it incontact 'combinationwith a-vertical, rotatable, circular ring, open on one side, and having a diering and-loose rollers on sa1d d1'e ring; .and a 8o l revoluble, conical screen, one end of which projects into said ring,jof a scraper which contacts with said die-ring; resilient means f for maintaining said contact; a supportfor said scraper, a guard liorpreveiiting .lateral 'I displacement of said roller, a stop for limiting their upward movement, and meansfor rotating saidscreen and ring in opposite directions.

14'. In a'mill of the character described, ad vertical, rotatable, circular ring,open on-one i -9 die-ring; and a conical, revoluble screen,one

side,.having adie-.ring and loose rollers on said end'of which'projects into said'ring,`of 'a vscraper comprising a chute', the upper endof which contacts with-said die-rin said chute being adapted to deflect the crus ed material from thediei-r'ing, into the screen, andmeans for rotating said-'ring and screen in' opposite directions Y.

15. Ina mill ofthe character'described, the combination with 'the' circular ring having' a die-ring and looserollers thereon, oian outer and linner conical screen, having a band at `eachend between vsaid'screens, and" arms con-4 `nectingsaid bands, one end of said screen projecting into one side of-saidv ring, and

-ioo

means for rotating said screen and ring in o pposite directions. v

In testimony-whereof I my signature l in presence fof two -witnesses.

Witnesses G. SARGEN'; ELLIOTT, Bessin TiioMPsoN.

WILLIAM E. WILD; i 

